Research Progress on Fatigue Performance of Steel-Concrete Composite Structures

Abstract

Steel-concrete composite structures integrate the superior tensile properties of steel and excellent compressive performance of concrete, which have been widely applied in long-span bridges, high-rise buildings, and industrial structures. Fatigue performance is one of the core control indicators for composite structures serving under long-term cyclic loads, such as vehicle traffic, wind excitation, and mechanical vibration. This paper systematically sorts out the latest research progress on the fatigue performance of steel-concrete composite structures in recent years. Firstly, the fatigue damage evolution mechanism of composite systems, including constituent materials and steel-concrete interface, is elaborated. Subsequently, the state-of-the-art experimental and numerical research on the fatigue behavior of typical composite members and key connectors is summarized. Then, the critical influencing factors, including material properties, structural details, service environment, and load characteristics, are comprehensively analyzed. Furthermore, the mainstream fatigue life evaluation methods and theoretical models are classified and discussed. Finally, the existing limitations of current research are pointed out, and the future research directions are prospected, aiming to provide reference for subsequent academic research and engineering application of steel-concrete composite structures.